US2008142488A1PendingUtilityA1

Compound electrode, methods of manufacture thereof and articles comprising the same

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Assignee: GEN ELECTRICPriority: Dec 19, 2006Filed: Dec 19, 2006Published: Jun 19, 2008
Est. expiryDec 19, 2026(~0.4 yrs left)· nominal 20-yr term from priority
Inventors:Yuanfeng LuoGarth M. NelsonUgo CantelliRenwei YuanYimin ZhanEnzo Nocciolini
B23H 1/06B23H 1/04B23H 7/08B23H 7/265B23H 9/14
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Claims

Abstract

Disclosed herein is a compound electrode comprising a first portion comprising graphite; and a second portion comprising a metal; wherein the first portion is in continuous communication with the second portion along a length of the compound electrode. Disclosed herein too is a compound electrode comprising a first portion comprising graphite; and a second portion comprising a metal; wherein the first portion is in a tight fit with the second portion along a length of the compound electrode. Disclosed herein is a method comprising creating an electric arc between a compound electrode and a workpiece; wherein the compound electrode comprises a first portion comprising graphite; and a second portion comprising a metal; wherein the first portion is in a tight fit with the second portion along a length of the compound electrode; and removing a portion of the workpiece.

Claims

exact text as granted — not AI-modified
1 . A compound electrode comprising:
 a first portion comprising graphite; and   a second portion comprising a metal; wherein the first portion is in continuous communication with the second portion along a length of the compound electrode.   
   
   
       2 . The compound electrode of  claim 1 , wherein the communication comprises a mechanical engagement of the first portion with the second portion. 
   
   
       3 . The compound electrode of  claim 2 , wherein the first portion is mechanically engaged with the second portion along the entire length of the first portion or the entire length of the second portion. 
   
   
       4 . The compound electrode of  claim 2 , wherein the first portion is mechanically engaged with the second portion along a part of an entire length of the first portion or a part of an entire length of the second portion. 
   
   
       5 . The compound electrode of  claim 1 , wherein the first portion is in a tight fit with the second portion. 
   
   
       6 . The compound electrode of  claim 1 , wherein the first portion and the second portion are mechanically engaged with each other via a locking device. 
   
   
       7 . The compound electrode of  claim 1 , wherein the first portion and the second portion are mechanically engaged with each other via a plurality of locking devices. 
   
   
       8 . The compound electrode of  claim 6 , wherein the locking device is operational to prevent relative motion between the first portion and the second portion. 
   
   
       9 . The compound electrode of  claim 1 , wherein the first portion is tubular and wherein the second portion is tubular. 
   
   
       10 . The compound electrode of  claim 9 , wherein the first portion has an outer surface that has a larger diameter than the diameter of the outer surface of the second portion. 
   
   
       11 . The compound electrode of  claim 9 , wherein the first portion has an outer surface that has a smaller diameter than the diameter of the outer surface of the second portion. 
   
   
       12 . The compound electrode of  claim 1 , wherein the first portion lies inside the second portion. 
   
   
       13 . The compound electrode of  claim 1 , wherein the second portion lies inside the first portion. 
   
   
       14 . The compound electrode of  claim 1 , wherein the first portion comprises a moldable composition that further comprises a binder; wherein the binder is an organic polymer. 
   
   
       15 . The compound electrode of  claim 1 , wherein the first portion comprises a sintered composition that further comprises a powdered metal. 
   
   
       16 . The compound electrode of  claim 6 , wherein the locking device comprises adhesive, rivets, bolts, nuts, screws, cotter pins, split pins, spring loaded cotter pins, or a combination comprising at least one of the foregoing locking devices. 
   
   
       17 . The compound electrode of  claim 1 , wherein the metal comprises brass, copper, stainless steel, carbon steel, or a combination comprising at least one of the foregoing metals. 
   
   
       18 . The compound electrode of  claim 17 , wherein the metal comprises brass, copper, stainless steel, carbon steel, aluminum, or a combination comprising at least one of the foregoing metals. 
   
   
       19 . The compound electrode of  claim 3 , wherein the first portion and the second portion share a common outer circumference along an entire length of the compound electrode. 
   
   
       20 . The compound electrode of  claim 3 , wherein the first portion and the second portion share a common outer circumference for a part of the length of the compound electrode. 
   
   
       21 . The compound electrode of  claim 3 , wherein the first portion has a smaller diameter than the second portion for a part of the length of the compound electrode. 
   
   
       22 . The compound electrode of  claim 3 , wherein the second portion has a smaller diameter than the first portion for a part of the length of the compound electrode. 
   
   
       23 . A compound electrode comprising:
 a first portion comprising graphite; and   a second portion comprising a metal; wherein the first portion is in a tight fit with the second portion along a length of the compound electrode.   
   
   
       24 . The compound electrode of  claim 23 , wherein the first portion surrounds the second portion. 
   
   
       25 . The compound electrode of  claim 23 , wherein the second portion surrounds the first portion. 
   
   
       26 . The compound electrode of  claim 23 , wherein the first portion comprise splines and wherein the second portion comprises opposing splines; and
 wherein the splines are mechanically engaged with each other.   
   
   
       27 . The compound electrode of  claim 23 , wherein the first portion comprises an outer surface that is frictionally engaged with an inner surface of the second portion. 
   
   
       28 . The compound electrode of  claim 23 , further comprising a locking device that minimizes relative motion between the first portion and the second portion. 
   
   
       29 . The compound electrode of  claim 23 , wherein the compound electrode comprises a first locking device and a second locking device; wherein the direction of the locking force of the first locking device inclined at an angle to the direction of the locking force of the second locking device. 
   
   
       30 . The compound electrode of  claim 23 , wherein the compound electrode is tubular in shape. 
   
   
       31 . A method comprising:
 creating an electric arc between a compound electrode and a workpiece;   wherein the compound electrode comprises a first portion comprising graphite; and a second portion comprising a metal; wherein the first portion is in a tight fit with the second portion along the length of the compound electrode; and   removing a portion of the workpiece.   
   
   
       32 . The method of  claim 31 , comprising discharging a fluid between the electrode and the workpiece. 
   
   
       33 . The method of  claim 31 , wherein the workpiece is a blisk airfoil, an engine casing, or a compressor impeller.

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